Question

Camelia si Maria au impreuna 98 lei. Daca Maria ar cheltui 12 lei, atunci ele ar avea sume egale. Cati lei are fiecare?

Answer 1

C /...../
M/....../..+12
cat reprezinta partile egale?
98 - 12 = 86
cat este un segment?
86 : 2 = 43
cati lei are Camelia?
1 x 43 = 43
cati lei are Maria?
1 x 43 + 12 = 43 + 12 = 55

Answer 2

c=camelia
m=maria
c+m=98
m-12=c=>m=c+12
Stiind ca c+M=98 atunci
c+c+12=98
2c=98-12=86
c=86:2
c=43
43+m=98
m=98-43
m=55